United States. Bureau of Labor Statistics.
Wages and Hours of Labor in Gasoline Filling Stations and Motor-Vehicle Repair Garages: 1931 : Bulletin of the United States Bureau of Labor Statistics, No. 578 ,
Washington:
U.S. Govt. Print. Off.,
February 1933, https://fraser.stlouisfed.org/title/4106,
accessed on March 25, 2025.